<!Doctype html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>C# 中 foreach 遍历的用法 | 菜鸟教程</title>

  <meta name='robots' content='max-image-preview:large' />
<link rel='stylesheet' id='classic-theme-styles-css' href='../0/classic-themes.min.css?ver=6.2' type='text/css' media='all' />
<link rel="canonical" href="../w3cnote/csharp-foreach.html" />
<meta name="keywords" content="C# 中 foreach 遍历的用法">
<meta name="description" content="foreach循环用于列举出集合中所有的元素，foreach语句中的表达式由关键字in隔开的两个项组成。in右边的项是集合名，in左边的项是变量名，用来存放该集合中的每个元素。 该循环的运行过程如下：每一次循环时，从集合中取出一个新的元素值。放到只读变量中去，如果括号中的整个表达式返回值为true，foreach块中的语句就能够执行。一旦集合中的元素都已经被访问到，整个表达式的值为false，控制流程就转入到foreach块后面 的执行..">
		
	<link rel="shortcut icon" href="https://static.runoob.com/images/favicon.ico">
	<link rel="stylesheet" href="../0/style.css?v=1.170" type="text/css" media="all" />	
	<link rel="stylesheet" href="../0/font-awesome.min.css" media="all" />	
  <!--[if gte IE 9]><!-->
  <script src=""></script>
  <!--<![endif]-->
  <!--[if lt IE 9]>
     <script src=""></script>
     <script src=""></script>
  <![endif]-->
  <link rel="apple-touch-icon" href="https://static.runoob.com/images/icon/mobile-icon.png"/>
  <meta name="apple-mobile-web-app-title" content="菜鸟教程">
</head>
<body>

<!--  头部 -->
<div class="container logo-search">

  <div class="col search row-search-mobile">
    <form action="index.php">
      <input class="placeholder" placeholder="搜索……" name="s" autocomplete="off">
      
    </form>
  </div>

  <div class="row">
    <div class="col logo">
      <h1><a href="../">菜鸟教程 -- 学的不仅是技术，更是梦想！</a></h1>
    </div>
        <div class="col right-list"> 
    <button class="btn btn-responsive-nav btn-inverse" data-toggle="collapse" data-target=".nav-main-collapse" id="pull" style=""> <i class="fa fa-navicon"></i> </button>
    </div>
        
    <div class="col search search-desktop last">
      <div class="search-input" >
      <form action="//www.runoob.com/" target="_blank">
        <input class="placeholder" id="s" name="s" placeholder="搜索……"  autocomplete="off" style="height: 44px;">
      </form>
      
      </div>
    </div>
  </div>
</div>



<!-- 导航栏 -->
<div class="container navigation">
    <div class="row">
        <div class="col nav">
            

                        <ul class="pc-nav" id="note-nav">
                <li><a href="../">首页</a></li>
                <li><a href="../w3cnote">笔记首页</a></li>
                <li><a href="../w3cnote/android-tutorial-intro.html" title="Android 基础入门教程">Android</a></li>
                <li><a href="../w3cnote/es6-tutorial.html" title="ES6 教程">ES6 教程</a></li>
                <li><a href="../w3cnote/ten-sorting-algorithm.html" title="排序算法">排序算法</a></li>
                <li><a href="../w3cnote/hadoop-tutorial.html" title="Hadoop 教程">Hadoop</a></li>
                <li><a href="../w3cnote/zookeeper-tutorial.html" title="Zookeeper 教程">Zookeeper</a></li>
                <li><a href="../w3cnote/verilog-tutorial.html" title="Verilog 教程">Verilog</a></li>
                <li><a href="../w3cnote_genre/code" title="编程技术">编程技术</a></li> 
                <li><a href="../w3cnote_genre/coderlife" title="程序员人生">程序员人生</a></li>
                
                <!--<li><a href="javascript:;" class="runoob-pop">登录</a></li>
                
                
                        <li>
                <a style="font-weight:bold;" href="../linux/linux-tutorial.html#yunserver" target="_blank" onclick="_hmt.push(['_trackEvent', 'aliyun', 'click', 'aliyun'])" title="kkb">云服务器</a>
                </li>
                <li><a href="http://gk.link/a/104mQ" target="_blank" style="font-weight: bold;"onclick="_hmt.push(['_trackEvent', '极客时间', 'click', 'jike'])" title="我的圈子">极客时间</a></li>
            
                
                <li><a target="_blank" href="../shoppinglist" rel="nofollow">知识店铺</a></li> 
        -->
            </ul>
                        
              
            <ul class="mobile-nav">
                <li><a href="../w3cnote">首页</a></li>
                <li><a href="../w3cnote_genre/android" target="_blank" title="Android 基础入门教程">Android</a></li>
                <li><a href="../w3cnote/es6-tutorial.html" target="_blank" title="ES6 教程">ES6</a></li>
                <li><a href="../w3cnote_genre/joke" target="_blank" title="程序员笑话">逗乐</a></li>
                
                <a href="javascript:void(0)" class="search-reveal">Search</a> 
            </ul>
            
        </div>
    </div>
</div>


<!--  内容  -->
<div class="container main">
	<div class="row">

		<div class="col middle-column big-middle-column">
	 			<div class="article">
			<div class="article-heading">
				<h2>C# 中 foreach 遍历的用法</h2>				<h3><em>分类</em> <a href="../w3cnote_genre/code" title="编程技术" >编程技术</a> </h3>
			</div>
			<div class="article-body note-body">
				<div class="article-intro">
					<p>foreach循环用于列举出集合中所有的元素，foreach语句中的表达式由关键字in隔开的两个项组成。in右边的项是集合名，in左边的项是变量名，用来存放该集合中的每个元素。</p>
<p>该循环的运行过程如下：每一次循环时，从集合中取出一个新的元素值。放到只读变量中去，如果括号中的整个表达式返回值为true，foreach块中的语句就能够执行。一旦集合中的元素都已经被访问到，整个表达式的值为false，控制流程就转入到foreach块后面 的执行语句。</p>
<p>foreach语句经常与数组一起使用，下面实例将通过foreach语句读取数组的值并进行显示。</p>
<p><strong>数组的属性：Array.Length数组的容量</strong></p>
<p>利用这个属性，我们可以取得数组对象允许存储的容量值，也就是数组的长度、元素个数,这个比较好理解，数组还有其他的属性，比如数组的维数等，属性的用法比较简单，学会一种，其他的格式基本一致，这里我们就不举例了。</p>
<p>当数组的维数、容量较多时，C#提供了foreach语句，专门用来读取集合/数组中的所有元素，我们把这种功能叫做遍历。语法书写如下：</p>
<p><strong>遍历数组：foreach（type objName in collection/Array）</strong></p>
<p>这段语句会逐一检查数组中的所存储的变量值，并且一一将其取出，其中的type是你所要读取的数组对象将要存储在objName变量的数据类型，而objName是定义了一个type类型的变量名，代表每一次从集合和数组（collection/Array）中取得的元素，collection/Array则是所要存取的数组对象。用这种方法只需写一个foreach就可以遍历出除交错数组以外的所有维数的数组。</p>
<p><strong>注：</strong> objName的数据类型type必须与collection/Array对象的类型相同或比它大。</p>
<p>下面我们举一个用foreach和for遍历规则数组的例子，其中涉及到了一个数组得到维数的方法，比较foreach在一次性遍历规则数组上的优势。</p>


<div class="example"><h2 class="example">实例</h2> <div class="example_code">
<span style="color: #6666cc; font-weight: bold;">int</span><span style="color: #008000;">&#91;</span>,,<span style="color: #008000;">&#93;</span> a <span style="color: #008000;">=</span> <span style="color: #008000;">new</span> <span style="color: #6666cc; font-weight: bold;">int</span><span style="color: #008000;">&#91;</span><span style="color: Maroon;">2</span>, <span style="color: Maroon;">2</span>, <span style="color: Maroon;">2</span><span style="color: #008000;">&#93;</span> <span style="color: #008000;">&#123;</span> <span style="color: #008000;">&#123;</span><span style="color: #008000;">&#123;</span> <span style="color: Maroon;">1</span>, <span style="color: Maroon;">2</span> <span style="color: #008000;">&#125;</span>, <span style="color: #008000;">&#123;</span> <span style="color: Maroon;">3</span>,<span style="color: Maroon;">4</span><span style="color: #008000;">&#125;</span><span style="color: #008000;">&#125;</span>,<span style="color: #008000;">&#123;</span><span style="color: #008000;">&#123;</span> <span style="color: Maroon;">5</span>, <span style="color: Maroon;">6</span> <span style="color: #008000;">&#125;</span>, <span style="color: #008000;">&#123;</span> <span style="color: Maroon;">7</span>,<span style="color: Maroon;">8</span><span style="color: #008000;">&#125;</span><span style="color: #008000;">&#125;</span> <span style="color: #008000;">&#125;</span><span style="color: #008000;">;</span><span style="color: #696969; font-style: italic;">// 定义一个2行2列2纵深的3维数组a</span><br />
<span style="color: #05a; font-weight: bold;">for</span> <span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">int</span> i <span style="color: #008000;">=</span> <span style="color: Maroon;">0</span><span style="color: #008000;">;</span> i <span style="color: #008000;">&lt;</span> a<span style="color: #008000;">.</span><span style="color: #05a;">GetLength</span> <span style="color: #008000;">&#40;</span><span style="color: Maroon;">0</span><span style="color: #008000;">&#41;</span> <span style="color: #008000;">;</span>i<span style="color: #008000;">++</span> <span style="color: #008000;">&#41;</span> &nbsp; <span style="color: #696969; font-style: italic;">//用Array.GetLength(n)得到数组[0,1,,,n]上的维数的元素数，0代表行，1列，n代表此数组是n+1维</span><br />
<span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; <span style="color: #05a; font-weight: bold;">for</span> <span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">int</span> j <span style="color: #008000;">=</span> <span style="color: Maroon;">0</span><span style="color: #008000;">;</span> j <span style="color: #008000;">&lt;</span> a<span style="color: #008000;">.</span><span style="color: #05a;">GetLength</span><span style="color: #008000;">&#40;</span><span style="color: Maroon;">1</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span> j<span style="color: #008000;">++</span><span style="color: #008000;">&#41;</span><br />
&nbsp; &nbsp; <span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #05a; font-weight: bold;">for</span> <span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">int</span> z <span style="color: #008000;">=</span> <span style="color: Maroon;">0</span><span style="color: #008000;">;</span> z <span style="color: #008000;">&lt;</span> a<span style="color: #008000;">.</span><span style="color: #05a;">GetLength</span><span style="color: #008000;">&#40;</span><span style="color: Maroon;">2</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span>z<span style="color: #008000;">++</span> <span style="color: #008000;">&#41;</span><span style="color: #696969; font-style: italic;">//2代表得到纵深上的元素数，如果数组有n维就得写n个for循环</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span><span style="color: #008000;">&#40;</span>a<span style="color: #008000;">&#91;</span>i,j,z<span style="color: #008000;">&#93;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#125;</span><br />
&nbsp; &nbsp; <span style="color: #008000;">&#125;</span><br />
<span style="color: #008000;">&#125;</span><br />
</div></div>

<p>用foreach循环一次性遍历a数组</p>

<div class="example"><h2 class="example">实例</h2> <div class="example_code">
<span style="color: #6666cc; font-weight: bold;">int</span><span style="color: #008000;">&#91;</span>,,<span style="color: #008000;">&#93;</span> a <span style="color: #008000;">=</span> <span style="color: #008000;">new</span> <span style="color: #6666cc; font-weight: bold;">int</span><span style="color: #008000;">&#91;</span><span style="color: Maroon;">2</span>, <span style="color: Maroon;">2</span>, <span style="color: Maroon;">2</span><span style="color: #008000;">&#93;</span> <span style="color: #008000;">&#123;</span> <span style="color: #008000;">&#123;</span><span style="color: #008000;">&#123;</span> <span style="color: Maroon;">1</span>, <span style="color: Maroon;">2</span> <span style="color: #008000;">&#125;</span>, <span style="color: #008000;">&#123;</span> <span style="color: Maroon;">3</span>,<span style="color: Maroon;">4</span><span style="color: #008000;">&#125;</span><span style="color: #008000;">&#125;</span>,<span style="color: #008000;">&#123;</span><span style="color: #008000;">&#123;</span> <span style="color: Maroon;">5</span>, <span style="color: Maroon;">6</span> <span style="color: #008000;">&#125;</span>, <span style="color: #008000;">&#123;</span> <span style="color: Maroon;">7</span>,<span style="color: Maroon;">8</span><span style="color: #008000;">&#125;</span><span style="color: #008000;">&#125;</span> <span style="color: #008000;">&#125;</span><span style="color: #008000;">;</span><span style="color: #696969; font-style: italic;">//定义一个2行2列2纵深的3维数组a</span><br />
<span style="color: #05a; font-weight: bold;">foreach</span><span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">int</span> i <span style="color: #05a; font-weight: bold;">in</span> a<span style="color: #008000;">&#41;</span><br />
<span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; Console <span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span> <span style="color: #008000;">&#40;</span>i<span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
<span style="color: #008000;">&#125;</span><br />
</div></div>

<p>这两种代码执行的结果是一样的都是 每行一个元素，共8行，元素分别是1 2 3 4 5 6 7 8</p>

<p>下面我们再做个例子，是一个利用for和foreach循环做的存取数组元素的例子，首先提示用户输入学生的个数，然后把学生个数作为存储学生姓名的数组names的元素个数，采用for循环按照数组的索引i从0位开始循环输出"输入学生姓名"的提示，并把用户输入的学生姓名按照其在数组的索引方式names[i]存储在names数组中，for循环次数的最大值（即索引的最大值）通过数组属性.Length得到，我们说过容量与索引之间的关系是index=Array.Length-1,本题即i的最大值<names.Length,存储后，提示"输出学生姓名"，再用foreach循环一次性遍历names数组中存储的每个元素（学生的姓名），一个一个的把它赋值给name元素，然后输出到控制台上。</p>
<p>
必须注意的是，借助foreach，只能一一取得数组中的元素，并不能利用这种语句改变数组所存储的元素。</p>
<p><img decoding="async" src="https://www.runoob.com/wp-content/uploads/2017/08/7492E0AA-97C8-4D82-9A8E-5ED1C7FCFE0F.jpg" alt="C# foreach" /></p>

<div class="example"><h2 class="example">实例</h2> <div class="example_code">
<span style="color: #05a; font-weight: bold;">using</span> <span style="color: #696969;">System</span><span style="color: #008000;">;</span><br />
<span style="color: #6666cc; font-weight: bold;">class</span> Program<br />
<span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; <span style="color: #05a; font-weight: bold;">static</span> <span style="color: #6666cc; font-weight: bold;">void</span> Main<span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><br />
&nbsp; &nbsp; <span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #6666cc; font-weight: bold;">int</span> count<span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span><span style="color: #008000;">&#40;</span><span style="color: #a11;">&quot;输入要登记的学生数&quot;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; count <span style="color: #008000;">=</span> <span style="color: #6666cc; font-weight: bold;">int</span><span style="color: #008000;">.</span><span style="color: #05a;">Parse</span><span style="color: #008000;">&#40;</span>Console<span style="color: #008000;">.</span><span style="color: #05a;">ReadLine</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #6666cc; font-weight: bold;">string</span><span style="color: #008000;">&#91;</span><span style="color: #008000;">&#93;</span>names <span style="color: #008000;">=</span> <span style="color: #008000;">new</span> <span style="color: #6666cc; font-weight: bold;">string</span><span style="color: #008000;">&#91;</span>count<span style="color: #008000;">&#93;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #05a; font-weight: bold;">for</span> <span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">int</span> i <span style="color: #008000;">=</span> <span style="color: Maroon;">0</span><span style="color: #008000;">;</span> i <span style="color: #008000;">&lt;</span> names<span style="color: #008000;">.</span><span style="color: #05a;">Length</span><span style="color: #008000;">;</span> i<span style="color: #008000;">++</span><span style="color: #008000;">&#41;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span><span style="color: #008000;">&#40;</span><span style="color: #a11;">&quot;请输入第{0}个学生的姓名&quot;</span>, i <span style="color: #008000;">+</span> <span style="color: Maroon;">1</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; names<span style="color: #008000;">&#91;</span>i<span style="color: #008000;">&#93;</span> <span style="color: #008000;">=</span> Console<span style="color: #008000;">.</span><span style="color: #05a;">ReadLine</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#125;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span><span style="color: #008000;">&#40;</span><span style="color: #a11;">&quot;已登记的学生如下&quot;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #05a; font-weight: bold;">foreach</span> <span style="color: #008000;">&#40;</span><span style="color: #6666cc; font-weight: bold;">string</span> name <span style="color: #05a; font-weight: bold;">in</span> names<span style="color: #008000;">&#41;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#123;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">WriteLine</span><span style="color: #008000;">&#40;</span><span style="color: #a11;">&quot;{0}&quot;</span>, name<span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #008000;">&#125;</span><br />
&nbsp; &nbsp; &nbsp; &nbsp; Console<span style="color: #008000;">.</span><span style="color: #05a;">ReadKey</span><span style="color: #008000;">&#40;</span><span style="color: #008000;">&#41;</span><span style="color: #008000;">;</span><br />
&nbsp; &nbsp; <span style="color: #008000;">&#125;</span><br />
<span style="color: #008000;">&#125;</span><br />
</div></div>
				</div>
			</div>
			<div class="previous-next-links">
			<div class="previous-design-link">← <a href="../w3cnote/python-yield-used-analysis.html" rel="prev"> Python yield 使用浅析</a> </div>
			<div class="next-design-link"><a href="../w3cnote/cpp-virtual-function.html" rel="next"> 虚函数和纯虚函数的区别</a> →</div>
			</div>
						<div class="article-heading-ad" id="w3cnote-ad728">
			<script async src=""></script>
			<!-- 移动版 自动调整 -->
			<ins class="adsbygoogle"
			     style="display:inline-block;min-width:300px;max-width:970px;width:100%;height:90px"
			     data-ad-client="ca-pub-5751451760833794"
			     data-ad-slot="1691338467"
			     data-ad-format="horizontal"></ins>
			<script>
			(adsbygoogle = window.adsbygoogle || []).push({});
			</script>
			</div>
			<style>
@media screen and (max-width: 768px) {
	#w3cnote-ad728 {
		display: none;
	}
}
p.note-author {
    border-bottom: 1px solid #ddd;
    font-size: 18px;
    font-weight: bold;
    color: #78a15a;
    padding-bottom: 2px;
    margin-bottom: 4px;
}
</style>
<script>
var aid = 19009;
</script>
	</div>
		
	</div>
	<div class="listcol last right-column">




<!--
	<div class="tab tab-light-blue"> 订阅</div>
	<div class="sidebar-box">
		<div class="socialicons">
			<a href="../feed" class="rss">RSS 订阅</a>
		
			<form action="//list.qq.com/cgi-bin/qf_compose_send" method="post">
			<input type="hidden" value="qf_booked_feedback" name="t">
			<input type="hidden" value="4b67b6b6c1f5e792559940cab4aebb8f1126fba880bff1a8" name="id">
			<input class="placeholder" id="feed_email" name="to" value="输入邮箱 订阅笔记" autocomplete="off">
			<input type="submit" value="订阅" class="btn btn-primary">
			</form>
		
		</div>
 
	</div>
-->	



<!--
	<div class="sidebar-box cate-list">
	<div class="sidebar-box recommend-here list-link">
			<a href="javascript:void(0);" style="font-size: 16px; color:#64854c;font-weight:bold;">笔记列表</a>
		</div>

 

</div>
-->

	 <div class="sidebar-box cate-list">
		 		

	 	<div class="sidebar-box recommend-here list-link">
			<a href="javascript:void(0);" style="font-size: 16px; color:#64854c;font-weight:bold;">教程列表</a>
		</div>
		
		<div class="cate-items"> 
				<a href="../ado">ADO 教程</a>
	<a href="../ajax">Ajax 教程</a>
	<a href="../android">Android 教程</a>
	<a href="../angularjs2">Angular2 教程</a>
	<a href="../angularjs">AngularJS 教程</a>
	<a href="../appml">AppML 教程</a>
	<a href="../asp">ASP 教程</a>
	<a href="../aspnet">ASP.NET 教程</a>
	<a href="../bootstrap">Bootstrap 教程</a>
	<a href="../bootstrap4">Bootstrap4 教程</a>
	<a href="../bootstrap5">Bootstrap5 教程</a>
	<a href="../cprogramming">C 教程</a>
	<a href="../csharp">C# 教程</a>
	<a href="../cplusplus">C++ 教程</a>
	<a href="../chartjs">Chart.js 教程</a>
	<a href="../cssref">CSS 参考手册</a>
	<a href="../css">CSS 教程</a>
	<a href="../css3">CSS3 教程</a>
	<a href="../django">Django 教程</a>
	<a href="../docker">Docker 教程</a>
	<a href="../dtd">DTD 教程</a>
	<a href="../echarts">ECharts 教程</a>
	<a href="../eclipse">Eclipse 教程</a>
	<a href="../firebug">Firebug 教程</a>
	<a href="../font-awesome">Font Awesome 图标</a>
	<a href="../foundation">Foundation 教程</a>
	<a href="../git">Git 教程</a>
	<a href="../go">Go 语言教程</a>
	<a href="../googleapi">Google 地图 API 教程</a>
	<a href="../highcharts">Highcharts 教程</a>
	<a href="../htmldom">HTML DOM 教程</a>
	<a href="../tags">HTML 参考手册</a>
	<a href="../charsets">HTML 字符集</a>
	<a href="../html">HTML 教程</a>
	<a href="../http">HTTP 教程</a>
	<a href="../ionic">ionic 教程</a>
	<a href="../ios">iOS 教程</a>
	<a href="../java">Java 教程</a>
	<a href="../jsref">JavaScript 参考手册</a>
	<a href="../js">Javascript 教程</a>
	<a href="../jeasyui">jQuery EasyUI 教程</a>
	<a href="../jquerymobile">jQuery Mobile 教程</a>
	<a href="../jqueryui">jQuery UI 教程</a>
	<a href="../jquery">jQuery 教程</a>
	<a href="../json">JSON 教程</a>
	<a href="../jsp">JSP 教程</a>
	<a href="../julia">Julia 教程</a>
	<a href="../kotlin">Kotlin 教程</a>
	<a href="../linux">Linux 教程</a>
	<a href="../lua">Lua 教程</a>
	<a href="../markdown">Markdown 教程</a>
	<a href="../matplotlib">Matplotlib 教程</a>
	<a href="../maven">Maven 教程</a>
	<a href="../memcached">Memcached 教程</a>
	<a href="../mongodb">MongoDB 教程</a>
	<a href="../mysql">MySQL 教程</a>
	<a href="../nodejs">Node.js 教程</a>
	<a href="../numpy">NumPy 教程</a>
	<a href="../pandas">Pandas 教程</a>
	<a href="../perl">Perl 教程</a>
	<a href="../php">PHP 教程</a>
	<a href="../postgresql">PostgreSQL 教程</a>
	<a href="../python3">Python 3 教程</a>
	<a href="../python">Python 基础教程</a>
	<a href="../r">R 教程</a>
	<a href="../rdf">RDF 教程</a>
	<a href="../react">React 教程</a>
	<a href="../redis">Redis 教程</a>
	<a href="../rss">RSS 教程</a>
	<a href="../ruby">Ruby 教程</a>
	<a href="../rust">Rust 教程</a>
	<a href="../sass">Sass 教程</a>
	<a href="../scala">Scala 教程</a>
	<a href="../scipy">SciPy 教程</a>
	<a href="../servlet">Servlet 教程</a>
	<a href="../soap">SOAP 教程</a>
	<a href="../sql">SQL 教程</a>
	<a href="../sqlite">SQLite 教程</a>
	<a href="../svg">SVG 教程</a>
	<a href="../svn">SVN 教程</a>
	<a href="../swift">Swift 教程</a>
	<a href="../tcpip">TCP/IP 教程</a>
	<a href="../typescript">TypeScript 教程</a>
	<a href="../vbscript">VBScript 教程</a>
	<a href="../vue2">Vue.js 教程</a>
	<a href="../vue3">Vue3 教程</a>
	<a href="../w3c">W3C 教程</a>
	<a href="../webservices">Web Service 教程</a>
	<a href="../wsdl">WSDL 教程</a>
	<a href="../xlink">XLink 教程</a>
	<a href="../dom">XML DOM 教程</a>
	<a href="../schema">XML Schema 教程</a>
	<a href="../xml">XML 教程</a>
	<a href="../xpath">XPath 教程</a>
	<a href="../xquery">XQuery 教程</a>
	<a href="../xslfo">XSLFO 教程</a>
	<a href="../xsl">XSLT 教程</a>
	<a href="../data-structures">数据结构</a>
	<a href="../regexp">正则表达式</a>
	<a href="../quiz">测验</a>
	<a href="../browsers">浏览器</a>
	<a href="../quality">网站品质</a>
	<a href="../web">网站建设指南</a>
	<a href="../hosting">网站服务器教程</a>
	<a href="../design-pattern">设计模式</a>
			
		</div> 
		 	 </div>
</div>
	</div>
</div>


<!-- 底部 -->
<div id="footer" class="mar-t50">
   <div class="runoob-block">
    <div class="runoob cf">
     <dl>
      <dt>
       在线实例
      </dt>
      <dd>
       &middot;<a target="_blank" href="../html/html-examples.html">HTML 实例</a>
      </dd>
      <dd>
       &middot;<a target="_blank" href="../css/css-examples.html">CSS 实例</a>
      </dd>
      <dd>
       &middot;<a target="_blank" href="../js/js-examples.html">JavaScript 实例</a>
      </dd>
      <dd>
       &middot;<a target="_blank" href="../ajx/ajax-examples.html">Ajax 实例</a>
      </dd>
       <dd>
       &middot;<a target="_blank" href="../jquery/jquery-examples.html">jQuery 实例</a>
      </dd>
      <dd>
       &middot;<a target="_blank" href="../xml/xml-examples.html">XML 实例</a>
      </dd>
      <dd>
       &middot;<a target="_blank" href="../java/java-examples.html">Java 实例</a>
      </dd>
     
     </dl>
     <dl>
      <dt>
      字符集&工具
      </dt>
      <dd>
       &middot; <a target="_blank" href="../charsets/html-charsets.html">HTML 字符集设置</a>
      </dd>
      <dd>
       &middot; <a target="_blank" href="../tags/html-ascii.html">HTML ASCII 字符集</a>
      </dd>
     <dd>
       &middot; <a target="_blank" href="https://c.runoob.com/front-end/6939/">JS 混淆/加密</a>
      </dd> 
      <dd>
       &middot; <a target="_blank" href="https://c.runoob.com/front-end/6232/">PNG/JPEG 图片压缩</a>
      </dd>
      <dd>
       &middot; <a target="_blank" href="../tags/html-colorpicker.html">HTML 拾色器</a>
      </dd>
      <dd>
       &middot; <a target="_blank" href="..//c.runoob.com/front-end/53">JSON 格式化工具</a>
      </dd>
      <dd>
       &middot; <a target="_blank" href="..//c.runoob.com/front-end/6680/">随机数生成器</a>
      </dd>
     </dl>
     <dl>
      <dt>
       最新更新
      </dt>
                   <dd>
       &middot;
      <a href="../matplotlib/matplotlib-imread.html" title="Matplotlib imread() 方法">Matplotlib imre...</a>
      </dd>
              <dd>
       &middot;
      <a href="../matplotlib/matplotlib-imsave.html" title="Matplotlib imsave() 方法">Matplotlib imsa...</a>
      </dd>
              <dd>
       &middot;
      <a href="../matplotlib/matplotlib-imshow.html" title="Matplotlib imshow() 方法">Matplotlib imsh...</a>
      </dd>
              <dd>
       &middot;
      <a href="../matplotlib/matplotlib-hist.html" title="Matplotlib 直方图">Matplotlib 直方图</a>
      </dd>
              <dd>
       &middot;
      <a href="../python3/python-func-object.html" title="Python object() 函数">Python object()...</a>
      </dd>
              <dd>
       &middot;
      <a href="../python3/python-ai-draw.html" title="Python AI 绘画">Python AI 绘画</a>
      </dd>
              <dd>
       &middot;
      <a href="../w3cnote/cursor-editor.html" title="神辅助 Cursor 编辑器，加入 GPT-4 让编码更轻松！">神辅助 Cursor ...</a>
      </dd>
             </dl>
     <dl>
      <dt>
       站点信息
      </dt>
      <dd>
       &middot;
       <a target="_blank" href="mailto:admin@runoob.com" rel="external nofollow">意见反馈</a>
       </dd>
      <dd>
       &middot;
      <a target="_blank" href="../disclaimer">免责声明</a>
       </dd>
      <dd>
       &middot;
       <a target="_blank" href="../aboutus">关于我们</a>
       </dd>
      <dd>
       &middot;
      <a target="_blank" href="../archives">文章归档</a>
      </dd>
    
     </dl>
    
     <div class="search-share">
      <div class="app-download">
        <div>
         <strong>关注微信</strong>
        </div>
      </div>
      <div class="share">
      <img width="128" height="128" src="/wp-content/themes/runoob/assets/images/qrcode.png" />
       </div>
     </div>
     
    </div>
   </div>
   <div class="w-1000 copyright">
     Copyright &copy; 2013-2023    <strong><a href="../" target="_blank">菜鸟教程</a></strong>&nbsp;
    <strong><a href="../" target="_blank">runoob.com</a></strong> All Rights Reserved. 备案号：<a target="_blank" rel="nofollow" href="https://beian.miit.gov.cn/">闽ICP备15012807号-1</a>
   </div>
  </div>
  <div class="fixed-btn">
    <a class="go-top" href="javascript:void(0)" title="返回顶部"> <i class="fa fa-angle-up"></i></a>
    <a class="qrcode"  href="javascript:void(0)" title="关注我们"><i class="fa fa-qrcode"></i></a>
    <a class="writer" style="display:none" href="javascript:void(0)"   title="标记/收藏"><i class="fa fa-star" aria-hidden="true"></i></a>
    <!-- qrcode modal -->
    <div id="bottom-qrcode" class="modal panel-modal hide fade in">
      <h4>微信关注</h4>
      <div class="panel-body"><img alt="微信关注" width="128" height="128" src="/wp-content/themes/runoob/assets/images/qrcode.png"></div> 
    </div>
  </div>

 <div style="display:none;">
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-84264393-2"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'UA-84264393-2');
</script>
<script>
var _hmt = _hmt || [];
(function() {
  var hm = document.createElement("script");
  hm.src = "https://hm.baidu.com/hm.js?3eec0b7da6548cf07db3bc477ea905ee";
  var s = document.getElementsByTagName("script")[0]; 
  s.parentNode.insertBefore(hm, s);
})();
</script>

</div>
<script>
window.jsui={
    www: 'https://www.runoob.com',
    uri: 'https://www.runoob.com/wp-content/themes/runoob'
};
</script>

<script src=""></script>
<script src=""></script>

</body>
</html>